Improvement in graining-machines



G. PELSTRING. GraJnng-Maohne,

204,078. Patented May 2 1, 1878.

NAPEERS, FHUTO-UTHDGRAPHER. WASHINGTON. Dl C- CUN iPATEN'lMClrFmpg-uGEORGE PELSTRING, OF CINCINNATI, OHIO. *n Y IM P'ROVEM `ENT` INGRAlNlNG-MACH Specification forming part of Letters Patent No. 204,078,dated May '21, v18778; application filed l April 2o, 187e.

To all whom it may concern: v

Be it known that I, GEORGE PELsTRING, of Cincinnati, Hamilton county,Ohio, have invented a new and useful Graining-Machine, of which thefollowingxis a specification:

My invention has for its object the imitation of the grain of the morevaluable woods on the surface of some of the cheaper kinds, as, forinstance, the grain of cedar on poplar Wood.

The device consists, essentially, of a revolving drum having on itsperipheral face an electrotyped or engraved plate, which, havingsuitable raised parts corresponding to the indent-ations of the grain ofthe wood to be imitated, serves to impress in any board passed under itthe exact imitation of the desired grain, said raised surfaces beinginked with a suitable composition by rollers placed near the top of thedrum, and the drum having immediately below it an idler covered withsome yielding substance, to support the wood to be treated, and yetallow of its yielding to any inequalities in the wood, so as to preventiniury to the design on the plate.

It further consists of a system of feed, polishing, and filling rollers,which latter, by rotating in a reverse direction to the former, operateto smooth out any irregularities and to partially lill the articialindentations with a mixture of glue, paste, and varnish previouslyspread over the board to be grained.-

In the accompanying drawing, Figure l represents a longitudinal sectionoi" my machine, and Fig. 2 a perspective view of apart of the face ofthe graining-drum.

A is the graining-drum, which is of such dimensions as to insuresufficient variety of grain and be operated. with any desired width ofboard. On the face of this drum there is an electrotyped or engravedplate, a, the exact counterpart of the grain of the wood de# sired to beimitated. The drum can be adjusted to any desired depth of grain bymeans which might otherwise injure the electrotyped plate. i D D and D Dare feed-rollers of iron or steel, which move in unison with the drum A.

Immediately following each of these sets of feed-rollers is a roller, EE', similar in construction to the idler C, and made to rotate at ahighspeed' in a contrary direction to the feed-rollers. Immediately undereach of these rollers E E is a roller, F, which acts as abed.

All the lower rollers F F, D D', and C are journaled in a frame, Gr.This frame is -capable of vertical motion, and is inclined on its lowersurfaces, and rests on a corresponding inclined surface on the frame H,which may be adjusted horizontally by means of screw I. By thisarrangement the frame G, and consequently all the lower or bed rollers,may be set to any desired height to accommodate different thicknesses oflumber.

' The tank J contains a suitable dye, generally of somewhat darker shadethan the dye with which the wood is stained. From a tank the die isimparted to the electrotyped` or engraved plate a by means of rollers K7c, in the same manner as the ink 4is delivered to the type in aprinting-press.

In operation, the lumber, after being properly stained the desired colorand coated with a mixtureof glue, paste, and varnish, is then passedbetween the drum A and roller C with its stained side up, and becomesimpressed on its stained side with numerous small indentations by meansof the electrotyped or engraved plate a, which may be so engraved as torepresent the grain of any desired Wood. The Y dye on the plate a givesthe indentations the natural dark appearance.

The board next passes between feed-rollersl D D, and then under theroller E, which acts as a polisher and ller,-it being necessary topartially fill the indentations in order to more fully imitate thenatural grain. l

' Both the rollers E and E operate to lill the grain with the mixture ofglue, paste, and var nish spread over the surface of the board; but thelatter more particularly serves to give a proper finish to the lumber.

rect connection with a planing-machine.

The operative rollers may, Qf. @purse be sie# plicated or triplicated onthe upper side ofthe stud' forthe production of more varied or morecomplicated grain effects, or may be duplicated below the stuff foroperating simultaneously on both sides of the same, if desired.

I claim as new and of my invention- 1. In a graining-machine, the drumA, having on its peripheral face an electrotyped or engraved plate, a,the exact counterpart of the grain of some particular kind of Wood, therollers K 7c near the upper part of said drinn for supplying thecomposition to the plate, and the idler C beneath the drum, for supportiing the wood to be grained, substantially as set forth.

2. The series of bed-rollers F F, feed and polishing @ns1-fillingrollers D D, Di PG and E `113.57611@ latter rotating in the contrarydirection to the former, and being composed of a GEO. PELSTRING.

Attest WALTER Kurqnr, 1+ 11i-BOND-

